7b0c7b6cb2
Stable rustfmt lacks a lot of features resulting in worse formatted code, thus use nightly formatter.
49 lines
1 KiB
Rust
49 lines
1 KiB
Rust
//! Utilities for handling mouse events.
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/// Recorded mouse delta designed to filter out noise.
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pub struct Delta<T> {
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x: T,
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y: T,
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}
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impl<T: Default> Default for Delta<T> {
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fn default() -> Self {
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Self { x: Default::default(), y: Default::default() }
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}
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}
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impl<T: Default> Delta<T> {
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pub(crate) fn set_x(&mut self, x: T) {
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self.x = x;
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}
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pub(crate) fn set_y(&mut self, y: T) {
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self.y = y;
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}
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}
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macro_rules! consume {
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($this:expr, $ty:ty) => {{
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let this = $this;
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let (x, y) = match (this.x.abs() < <$ty>::EPSILON, this.y.abs() < <$ty>::EPSILON) {
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(true, true) => return None,
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(false, true) => (this.x, 0.0),
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(true, false) => (0.0, this.y),
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(false, false) => (this.x, this.y),
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};
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Some((x, y))
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}};
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}
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impl Delta<f32> {
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pub(crate) fn consume(self) -> Option<(f32, f32)> {
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consume!(self, f32)
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}
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}
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impl Delta<f64> {
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pub(crate) fn consume(self) -> Option<(f64, f64)> {
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consume!(self, f64)
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}
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}
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